From Wikipedia:

Oprah Winfrey (born Orpah Gail Winfrey;[1] January 29, 1954) is an American media executiveactresstalk show hosttelevision producer and philanthropist. She is best known for her talk show The Oprah Winfrey Show, which was the highest-rated television program of its kind in history and was nationally syndicated from 1986 to 2011 in Chicago.[6] Dubbed the “Queen of All Media”,[7] she was the richest African American of the 20th century[8][9] and North America’s first black multi-billionaire,[10] and has been ranked the greatest black philanthropist in American history.[11][12] She has also been sometimes ranked as the most influential woman in the world.[13][14]

Winfrey was born into poverty in rural Mississippi to a teenage single mother and later raised in an inner-city Milwaukee neighborhood. She has stated that she was molested during her childhood and early teens and became pregnant at 14; her son died in infancy.[15] Sent to live with the man she calls her father, Vernon Winfrey, a barber in Tennessee, she landed a job in radio while still in high school and began co-anchoring the local evening news at the age of 19. Her emotional ad-lib delivery eventually got her transferred to the daytime talk show arena, and after boosting a third-rated local Chicago talk show to first place,[16] she launched her own production company and became internationally syndicated.

Credited with creating a more intimate confessional form of media communication,[17] she is thought to have popularized and revolutionized[17][18] the tabloid talk show genre pioneered by Phil Donahue,[17] through which, according to a Yale University study, she broke 20th-century taboos and allowed LGBT people to enter the mainstream.[19][20]

By the mid-1990s, she had reinvented her show with a focus on literature, self-improvement and spirituality. Though criticized for unleashing a confession culture, promoting controversial self-help ideas,[21] and having an overly emotion-centered approach,[22] she is often praised for overcoming adversity to become a benefactor to others.[23] From 2006 to 2008, her endorsement of Barack Obama, by one estimate, delivered over a million votes in the close 2008 Democratic primary race, and led to Obama winning the election.[24] In 2013, she was awarded the Presidential Medal of Freedom by President Obama[25] and honorary doctorate degrees from Duke and Harvard.[26][27]